<html>
<head>
<meta http-equiv=Content-Type content="text/html; charset=utf-8">
<title>welcome page</title>
</head>
<body>Welcome to my tiny web server!</body>
<form action="/cgi_bin/adder" method="POST">
<p>加数一：<input type="text" name="a"/></p>
<p>加数二：<input type="text" name="b"/></p>
<input type="submit" value="提交">
</html>
